Peramphithoe bungareei, Hughes, Lauren E. & Peart, Rachael A., 2013

Hughes, Lauren E. & Peart, Rachael A., 2013, New species and new records of Ampithoidae (Peracarida: Amphipoda) from Australian Waters, Zootaxa 3719 (1), pp. 1-102 : 95-96

Peramphithoe bungareei sp. nov.

( Figs. 62 , 63 )

Type material. Holotype male, 11.1 mm, dissected, 4 slides, AM P.90120, north of Lion Island, Broken Bay, New South Wales, Australia (33°33’S 151°19’E), depth unknown, 30 March 1972, coll. Australian Museum Marine Ecology Department (station 2); paratypes 6 specimens, AM P.77125, north of Lion Island, Broken Bay (33°33’S 151°19’E), depth unknown, 30 March 1972, coll. Australian Museum Marine Ecology Department (station 2).

Type locality. North of Lion Island, Broken Bay, New South Wales, Australia (33°33’S 151°19’E).

Etymology. Named for Bungaree, an outstanding elder from Broken Bay, who was the first indigenous person to circum-navigate Australia.

Diagnosis. Mandible accessory setal row with 9 robust setae. Maxilla 1 outer plate palp slender, article 2 with 4 robust setae. Gnathopod 1 coxa subequal to coxa 2, anterior margin straight, anteroventral corner rounded; propodus long, subrectangular, length 3 times width, palm transverse, straight, defined by subquadrate corner, without robust setae, palm length 0.15 times posterior margin; dactylus overreaching palm, apically acute, tapering evenly, inner margin crenate. Gnathopod 2 scarpus compressed, cup-shaped, length subequal to width; propodus subrectangular, length 2 times width, palm acute, distally concave, without palm defining corner or robust setae, palm length undefined along posterior margin; dactylus extending to 0.5 times propodus posterior margin. Telson apically rounded, 2 pairs of lateral setae and 1 pair of apical setae.

Description of holotype. Head. Antenna 1 similar to Antenna 2; article 1 length 1.1 times article 2; article 2 length 0.3 times article 3; article 3 length 4 times article 1; primary flagellum incomplete, 28 articles; accessory flagellum absent. Antenna 2 article 4 subequal to article 5; flagellum 17 articles.Mandible accessory setal row with 9 robust setae; palp 3-articulate, article 2 without slender setae; article 3 length twice width. Maxilla 1 inner plate with 1 slender seta, outer plate palp slender, article 2 with 4 robust setae.

Pereon. Coxae 1–4 longer than broad. Gnathopod 1 smaller than gnathopod 2; coxa 1 subequal to coxa 2, anterior margin straight, anteroventral corner rounded; basis subequal in length to coxa, posterior margin with a few sparse slender setae, anterodistal corner subquadrate; ischium anterior margin without lobe; merus anterodistal corner acutely produced; carpus subtriangular, length 2.1 times width, 0.9 times propodus length; propodus long, subrectangular, length 3 times width, palm transverse, straight, defined by subquadrate corner, without robust setae, palm length 0.15 times posterior margin; dactylus overreaching palm, apically acute, tapering evenly, inner margin crenate. Gnathopod 2 sexually dimorphic; basis subequal in length to coxa, anterodistal corner with weak lobe, with 1 slender seta; ischium and merus anterior margin without lobe; carpus compressed, cup-shaped, length subequal to width, 0.3 times propodus length; propodus subrectangular, length 2 times width, palm acute, distally concave, without palm defining corner or robust setae, palm length undefined along posterior margin; dactylus reaching along half-length of propodus posterior margin, apically subacute, tapering evenly, inner margin smooth.

Pleon. Epimera 1–2 subquadrate, posterior margin straight, posterodistal corner with small acute tooth. Epimeron 3 subquadrate, posterior margin convex, posterodistal corner with small acute tooth. Uropod 1 long, reaching past uropod 2 rami; peduncle length 2.8 times width, with 11 robust setae, with large, acute distoventral spine; inner ramus 0.8 times peduncle length, longer than outer ramus, without marginal setae; outer ramus broad with 8 marginal robust setae. Uropod 2 peduncle with small subacute distoventral spine, with 5 robust setae; inner ramus shorter than outer ramus, 7 marginal robust setae; outer ramus with 10 marginal robust setae. Uropod 3 peduncle length 1.8 times width, 2.2 times rami length, without marginal robust setae, with 6 distal peduncular robust setae, 7 distal slender setae; inner ramus length subequal to width, with 1 distal robust seta, 11 distal slender setae and 2 lateral robust setae; outer ramus shorter than inner ramus, with 2 large recurved distal robust setae, patch of small lateral denticles and lateral setal fringe. Telson subtrapezoidal, apically rounded, with small apical cusps, 2 pairs of lateral setae, 2 pairs of lateral plumose setae and 1 pair of apical setae.

Remarks. The gnathopod 1 propodus transverse palm, the mandible with palp and uropod 1 with anterodistal spine place this species in Peramphithoe . The acute gnathopod 2 propodus palm is also typical of species within this genus. Peramphithoe bungareei sp. nov. has the male gnathopod 2 dactylus extending slightly past half the length of the propodus, similar to P. orientalis (Dana, 1853) and another Australian species, P. parmerong (Poore & Lowry, 1997) . Peramphithoe bungareei sp. nov. differs from P. orientalis and P. parmerong in the gnathopod 2 propodus palm with shallow sinus, uropod 1 inner ramus without medial robust setae and the uropod 2 peduncle with short anterodistal spine.

Distribution. Australia. New South Wales: Broken Bay (current study).

Figures

FIGURE 62. Peramphithoe bungareei sp. nov., holotype male, 11.1 mm, AM P. 90120, Lion Island, Broken Bay, New South Wales.

FIGURE 63. Peramphithoe bungareei sp. nov., holotype male, 11.1 mm, AM P. 90120, Lion Island, Broken Bay, New South Wales, scales 0.1 mm.